AES E-Library

AES E-Library

Real-Time Implementation of Robust PEM-AFROW Based Solutions for Acoustic Feedback Control

Acoustic feedback is a longstanding problem in the audio processing field, occurring whenever sound is captured and reproduced in the same environment.
Different control strategies have been proposed over the years, among which a feedback cancellation technique based on the prediction error method (PEM) has revealed to be performing on purpose. Recent studies have shown that the integration of a suppression or a noise reduction filter in the system loop might be beneficial from different perspectives.
In this contribution, a real-time implementation of the aforementioned algorithm is presented, which exploits the partitioned-block frequency-domain (PBFD) technique to allow the system to work also with long acoustic paths.
NU-Tech software platform has been used on purpose for real-time simulations, performed over synthetic and real acoustic conditions.